31results about How to "Guaranteed leveling accuracy" patented technology

The invention relates to a high-precision combined leveling method suitable for a standard rice seedling raising shed. The high-precision combined leveling method comprises the following steps that firstly, a shallow surface soil layer is chopped through square coulters at the front end of a machine body frame, then rotary extrusion soil leveling operation is performed through a rotary leveler, and a rolling soil leveling roller is driven by power rotation of a central main shaft to move forwards along with the leveler; the surface soil layer of a seedling raising shed basal plane is subjected to the action of rotating thrust of the rolling soil leveling roller so that soil particles of the surface soil layer of a seedling raising shed basal plane form a planar spiral flowing effect, continuous circular surface uniform flattening is carried out, under the action of spiral surface friction, soil at the raised areas are evenly pushed to lower terrain positions, it is fully guaranteed that the rolling soil leveling roller repeatedly extrudes the surface soil, soil layer air elimination gaps are removed, and therefore the flatness and the compaction degree are improved; and finally, the leveled basal plane is pressed by a drum-type pressing machine at the rear part of the machine body frame, and the soil basal plane is forcibly pressed again to compact the ground surface. According to the high-precision combined leveling method, a crushing-flattening-pressing combined finishing process is realized, and the requirement of finely flattening the seedling raising basal plane is met at a time.